Missing asymmetric encryption method in ASAPCryptoAlgorithms

[RocketJannis]

The class ASAPCryptoAlgorithms is missing a useful method for encrypting bytes using asymmetric encryption without using the encrypted message.

Here is an example implementation:

/**
 * Uses asymmetric encryption to encrypt the unencryptedBytes using the public key of the recipient.
 * @param unencryptedBytes bytes to encrypt
 * @param recipient identifier of the recipient
 * @param ASAPKeyStore key store that holds the public key of the recipient
 * @return encrypted bytes
 * @throws ASAPSecurityException if the public key is missing or other problems occurred during encryption
 */
public static byte[] encryptAsymmetric(byte[] unencryptedBytes, CharSequence recipient, ASAPKeyStore ASAPKeyStore) throws ASAPSecurityException {
 PublicKey publicKey = ASAPKeyStore.getPublicKey(recipient);
 if (publicKey == null) {
 throw new ASAPSecurityException("recipients' public key cannot be found");
 } else {
 try {
 Cipher cipher = Cipher.getInstance(ASAPKeyStore.getAsymmetricEncryptionAlgorithm());
 cipher.init(1, publicKey);
 return cipher.doFinal(unencryptedBytes);
 } catch (InvalidKeyException | NoSuchPaddingException | IllegalBlockSizeException | BadPaddingException |
 NoSuchAlgorithmException e) {
 throw new ASAPSecurityException("problems when encrypting", e);
 }
 }
}